/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package Controlers;

import Pojos.GioHang;
import Pojos.SanPham;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.sf.ehcache.constructs.asynchronous.Command;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/**
 *
 * @author Hong Lam
 */
@WebServlet(name="xemGioHangControler", urlPatterns={"/xemGioHangControler"})
public class xemGioHangControler extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        String command = request.getParameter("action");
        if (command == null){
            response.sendRedirect("/");
        }else{
            if (command.compareTo("themSanPham") == 0){
                themSanPham(request, response);
            }
        }

    }

    protected void themSanPham(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        String maSanPham = request.getParameter("maSanPham");
        if(maSanPham == null){
            maSanPham = "";
        }
        SessionFactory factory = new Configuration().configure("Pojos/hibernate.cfg.xml").buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("from SanPham Where maSanPham = ?");
        query.setString(0, maSanPham);
        SanPham sanPham = (SanPham) query.uniqueResult();
        HttpSession httpSession = request.getSession();
        ArrayList<GioHang> gioHang = (ArrayList<GioHang>)httpSession.getAttribute("gioHang");
        if (gioHang == null){
            gioHang = new ArrayList<GioHang>();
            httpSession.setAttribute("gioHang", gioHang);
        }
        int i = 0;
        for(i = 0; i < gioHang.size(); i++){
            if(gioHang.get(i).getSp().getMaSanPham().compareTo(maSanPham) == 0){
                int soLuong = gioHang.get(i).getSoLuong() + 1;
                gioHang.get(i).setSoLuong(soLuong);
                break;
            }
        }
        if(i == gioHang.size()){
            GioHang gh = new GioHang(sanPham, 1);
            if(sanPham.getMaSanPham().compareTo("") != 0){
                gioHang.add(new GioHang(sanPham, 1));
            }
        }
        session.close();
        response.sendRedirect("/WebsiteBanHang/giohang.jsp");
    }

    protected void laySanPhamTheoMaSanPham(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String maSanPham = request.getParameter("maSanPham");
        SessionFactory factory = new Configuration().configure("Pojos/hibernate.cfg.xml").buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("From SanPham Where maSanPham = ?");
        query.setString(0, maSanPham);

        List<SanPham> lstSanPham = (List<SanPham>) query.list();

        request.setAttribute("danhSachSanPham", lstSanPham);
        session.close();
        request.getRequestDispatcher("giohang.jsp").forward(request, response);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
